AMX HDMI-UTPRO-0808 Custom Hdmi Edid Files for Handling Audio Concerns, Troubleshooting Example

Appendix A – EDID Programmer

10.Save the connector’s EDID default as a backup (assumes the connector has factory default EDID programming).

Click the Refresh Display List button. Select the device.

Click the Read button.

Click the Save button (select location, enter file name, and click Save).

11.Click the Open button to select the .edid file to be written to the HDMI input connector.

12.Click the Write button to write the EDID information to the HDMI input connector.

13.If applicable – Repeat any of the steps necessary for any of the other HDMI input connectors.

14.Disconnect the HDMI cable from the PC and from the HDMI input connector.

15.Disconnect the serial cable from the PC and from the HDMI UTPro enclosure.

Custom HDMI EDID Files for Handling Audio Concerns

Since an HDMI UTPro will be installed between multiple source and sink devices which often support different video and audio formats, it is possible that neither the video nor the audio routed by the

HDMI UTPro can be displayed on one or more of the destination devices. Customizing the EDID content at the HDMI UTPro’s input channels is one way to be sure that the formats provided by the source are compatible with most/all of the destination devices.

The following files can be found at www.amx.com/products/EDIDLibrary.asp.

The first group of files use 1080p (VIC 16) as the preferred (native) video resolution.

File Name	EDID File	Monitor Name	Description
	Checksum
AMX_HDMI1_A1.edid	8D	AMX_HDMI1_A1	Default shipped EDID content on each
			input. Supports audio up to 192 k for
			L-PCM, 48 kHz Dolby (5.1), and 48 kHz
			DTS (5.1).
AMX_HDMI1_A1_basicAudio.edid	EE	AMX_0300_001	Supports basic audio only
			(L-PCM 32 k, 44.1 k, and 48 k).
The second group of files use 720p (VIC 4) as the preferred (native) video resolution.
File Name	EDID File	Monitor Name	Description
	Checksum
AMX_HDMI1_A1_720p.edid	A2	AMX_0301_002	Supports audio up to 192 k for L-PCM,
			48 kHz Dolby (5.1), and 48 kHz DTS (5.1).
AMX_HDMI1_A1_720p_basicAudio.edid	92	AMX_0300_003	Supports basic audio only
			(L-PCM 32 k, 44.1 k, and 48 k).

Troubleshooting Example

Problem:

One example is when a source device that selects the highest supported video and audio formats is installed with a sink whose input is limited to 720p and basic audio. Using the default shipping EDID content would result in 1080p and possibly either 192 k stereo, Dolby 5.1, or DTS 5.1 audio arriving at the sink when a route was completed through the HDMI UTPro. The end result would probably be neither video nor audio.

Solution:

To fix this problem, use the EDID Programmer to reprogram the HDMI UTPro input’s EDID to the content supplied in one of the files listed above. For the example given, the best choice would be the file named AMX_HDMI1_A1_720p_basicAudio.edid.

Instruction Manual – HDMI-UTPRO-0808 105